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authorArnd Bergmann <arnd@arndb.de>2019-02-15 20:49:56 +0100
committerArnd Bergmann <arnd@arndb.de>2019-02-15 20:50:20 +0100
commit5aa8f495d6ef70dbb200093a31d995ba96fcccd6 (patch)
tree8febcc3bd28dcba6b2aa6f796b8325a5ac5c6310 /drivers/soc
parent50b0225bf412df3cdeb2dc89b7e4b1119e30bedb (diff)
parented10a259faa1bbdf77b8c2153b274b70c90cbb35 (diff)
downloadlinux-5aa8f495d6ef70dbb200093a31d995ba96fcccd6.tar.bz2
Merge tag 'qcom-drivers-for-5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux into arm/drivers
Qualcomm ARM Based Driver Updates for v5.1 - Part 2 * Fixups/Cleanup for Qualcomm LLCC * tag 'qcom-drivers-for-5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux: qcom: soc: llcc-slice: Consolidate some code qcom: soc: llcc-slice: Clear the global drv_data pointer on error Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/soc')
-rw-r--r--drivers/soc/qcom/llcc-sdm845.c6
-rw-r--r--drivers/soc/qcom/llcc-slice.c101
2 files changed, 74 insertions, 33 deletions
diff --git a/drivers/soc/qcom/llcc-sdm845.c b/drivers/soc/qcom/llcc-sdm845.c
index 2e1e4f0a5db8..86600d97c36d 100644
--- a/drivers/soc/qcom/llcc-sdm845.c
+++ b/drivers/soc/qcom/llcc-sdm845.c
@@ -71,6 +71,11 @@ static struct llcc_slice_config sdm845_data[] = {
SCT_ENTRY(LLCC_AUDHW, 22, 1024, 1, 1, 0xffc, 0x2, 0, 0, 1, 1, 0),
};
+static int sdm845_qcom_llcc_remove(struct platform_device *pdev)
+{
+ return qcom_llcc_remove(pdev);
+}
+
static int sdm845_qcom_llcc_probe(struct platform_device *pdev)
{
return qcom_llcc_probe(pdev, sdm845_data, ARRAY_SIZE(sdm845_data));
@@ -87,6 +92,7 @@ static struct platform_driver sdm845_qcom_llcc_driver = {
.of_match_table = sdm845_qcom_llcc_of_match,
},
.probe = sdm845_qcom_llcc_probe,
+ .remove = sdm845_qcom_llcc_remove,
};
module_platform_driver(sdm845_qcom_llcc_driver);
diff --git a/drivers/soc/qcom/llcc-slice.c b/drivers/soc/qcom/llcc-slice.c
index 80667f7be52c..83a263926a25 100644
--- a/drivers/soc/qcom/llcc-slice.c
+++ b/drivers/soc/qcom/llcc-slice.c
@@ -46,7 +46,7 @@
#define BANK_OFFSET_STRIDE 0x80000
-static struct llcc_drv_data *drv_data;
+static struct llcc_drv_data *drv_data = (void *) -EPROBE_DEFER;
static const struct regmap_config llcc_regmap_config = {
.reg_bits = 32,
@@ -68,6 +68,9 @@ struct llcc_slice_desc *llcc_slice_getd(u32 uid)
struct llcc_slice_desc *desc;
u32 sz, count;
+ if (IS_ERR(drv_data))
+ return ERR_CAST(drv_data);
+
cfg = drv_data->cfg;
sz = drv_data->cfg_size;
@@ -108,6 +111,9 @@ static int llcc_update_act_ctrl(u32 sid,
u32 slice_status;
int ret;
+ if (IS_ERR(drv_data))
+ return PTR_ERR(drv_data);
+
act_ctrl_reg = LLCC_TRP_ACT_CTRLn(sid);
status_reg = LLCC_TRP_STATUSn(sid);
@@ -143,6 +149,9 @@ int llcc_slice_activate(struct llcc_slice_desc *desc)
int ret;
u32 act_ctrl_val;
+ If (IS_ERR(drv_data))
+ return PTR_ERR(drv_data);
+
if (IS_ERR_OR_NULL(desc))
return -EINVAL;
@@ -180,6 +189,9 @@ int llcc_slice_deactivate(struct llcc_slice_desc *desc)
u32 act_ctrl_val;
int ret;
+ If (IS_ERR(drv_data))
+ return PTR_ERR(drv_data);
+
if (IS_ERR_OR_NULL(desc))
return -EINVAL;
@@ -289,46 +301,62 @@ static int qcom_llcc_cfg_program(struct platform_device *pdev)
return ret;
}
+int qcom_llcc_remove(struct platform_device *pdev)
+{
+ /* Set the global pointer to a error code to avoid referencing it */
+ drv_data = ERR_PTR(-ENODEV);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(qcom_llcc_remove);
+
+static struct regmap *qcom_llcc_init_mmio(struct platform_device *pdev,
+ const char *name)
+{
+ struct resource *res;
+ void __iomem *base;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
+ if (!res)
+ return ERR_PTR(-ENODEV);
+
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return ERR_CAST(base);
+
+ return devm_regmap_init_mmio(&pdev->dev, base, &llcc_regmap_config);
+}
+
int qcom_llcc_probe(struct platform_device *pdev,
const struct llcc_slice_config *llcc_cfg, u32 sz)
{
u32 num_banks;
struct device *dev = &pdev->dev;
- struct resource *llcc_banks_res, *llcc_bcast_res;
- void __iomem *llcc_banks_base, *llcc_bcast_base;
int ret, i;
struct platform_device *llcc_edac;
drv_data = devm_kzalloc(dev, sizeof(*drv_data), GFP_KERNEL);
- if (!drv_data)
- return -ENOMEM;
-
- llcc_banks_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
- "llcc_base");
- llcc_banks_base = devm_ioremap_resource(&pdev->dev, llcc_banks_res);
- if (IS_ERR(llcc_banks_base))
- return PTR_ERR(llcc_banks_base);
-
- drv_data->regmap = devm_regmap_init_mmio(dev, llcc_banks_base,
- &llcc_regmap_config);
- if (IS_ERR(drv_data->regmap))
- return PTR_ERR(drv_data->regmap);
-
- llcc_bcast_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
- "llcc_broadcast_base");
- llcc_bcast_base = devm_ioremap_resource(&pdev->dev, llcc_bcast_res);
- if (IS_ERR(llcc_bcast_base))
- return PTR_ERR(llcc_bcast_base);
-
- drv_data->bcast_regmap = devm_regmap_init_mmio(dev, llcc_bcast_base,
- &llcc_regmap_config);
- if (IS_ERR(drv_data->bcast_regmap))
- return PTR_ERR(drv_data->bcast_regmap);
+ if (!drv_data) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ drv_data->regmap = qcom_llcc_init_mmio(pdev, "llcc_base");
+ if (IS_ERR(drv_data->regmap)) {
+ ret = PTR_ERR(drv_data->regmap);
+ goto err;
+ }
+
+ drv_data->bcast_regmap =
+ qcom_llcc_init_mmio(pdev, "llcc_broadcast_base");
+ if (IS_ERR(drv_data->bcast_regmap)) {
+ ret = PTR_ERR(drv_data->bcast_regmap);
+ goto err;
+ }
ret = regmap_read(drv_data->regmap, LLCC_COMMON_STATUS0,
&num_banks);
if (ret)
- return ret;
+ goto err;
num_banks &= LLCC_LB_CNT_MASK;
num_banks >>= LLCC_LB_CNT_SHIFT;
@@ -340,8 +368,10 @@ int qcom_llcc_probe(struct platform_device *pdev,
drv_data->offsets = devm_kcalloc(dev, num_banks, sizeof(u32),
GFP_KERNEL);
- if (!drv_data->offsets)
- return -ENOMEM;
+ if (!drv_data->offsets) {
+ ret = -ENOMEM;
+ goto err;
+ }
for (i = 0; i < num_banks; i++)
drv_data->offsets[i] = i * BANK_OFFSET_STRIDE;
@@ -349,8 +379,10 @@ int qcom_llcc_probe(struct platform_device *pdev,
drv_data->bitmap = devm_kcalloc(dev,
BITS_TO_LONGS(drv_data->max_slices), sizeof(unsigned long),
GFP_KERNEL);
- if (!drv_data->bitmap)
- return -ENOMEM;
+ if (!drv_data->bitmap) {
+ ret = -ENOMEM;
+ goto err;
+ }
drv_data->cfg = llcc_cfg;
drv_data->cfg_size = sz;
@@ -359,7 +391,7 @@ int qcom_llcc_probe(struct platform_device *pdev,
ret = qcom_llcc_cfg_program(pdev);
if (ret)
- return ret;
+ goto err;
drv_data->ecc_irq = platform_get_irq(pdev, 0);
if (drv_data->ecc_irq >= 0) {
@@ -370,6 +402,9 @@ int qcom_llcc_probe(struct platform_device *pdev,
dev_err(dev, "Failed to register llcc edac driver\n");
}
+ return 0;
+err:
+ drv_data = ERR_PTR(-ENODEV);
return ret;
}
EXPORT_SYMBOL_GPL(qcom_llcc_probe);